It's complicated to figure out what folks who are 55 years or better should be doing. Here's a quick list courtesy of google:"Seattle senior citizen":
* Seattle Parks & Recreation: For Seniors. Seattle Parks and Recreation Senior Adult Programs offer a wide range of activities for seniors that change each season.
* "Senior Centers":http://www.seniorservices.org/sc/centers.htm. A good list is here. There are centers in the Central District, Ballard, West Seattle. The Central District one has $12 dues and they run a variety of activities. It is at Jackson and 30th
* "Community Centers":http://www.cityofseattle.net/parks/centers/index.htm. These are general purpose community centers. The Montlake Center is under construction, but "Miller Community Center":http://www.cityofseattle.net/parks/centers/miller.htm is close by and has buried in a "pdf":http://www.cityofseattle.net/parks/centers/Miller/Spring06.pdf
** Friday 1-3PM. Bridge for anyone
** Tai Chi
** Field trips like going to Olympia June 8, Thursday but you need to call specific days to 684-4240 at 8AM to register.
** Morning Fitness will be held in the Miller Community Center Gym at 7 & 8:15 a.m.
** Adult Karate will be held at McGilvra Elementary School Gym at 1617 38th Ave. E, 6:30 - 8:30 p.m.
* Call 206-684-4951 for city-wide senior programs
* "CISC":http://www.cisc-seattle.org/. This is a chinese information center. There is also an adult daycare called the Sunshine Garden.
There are some things a little farther afield:
* "Seattle Bridge Club":http://seattlebridgecenter.tripod.com/. They are up north at NE 145th. But they have a very active schedule 10:30AM on Monday thru Friday.
* "Seattle Times Aging":http://seattletimes.nwsource.com/html/aging/. There is section on aging and a senior calendar updated weekly on this site.